Car-braking mechanism.



Patented Feb. 27, I900.-

J. F. McELBUY.

' GAR BRAKING MECHANISM.

Tali-112E555 No. 644,444. Patented Feb. 27, I900.

. J. F. McELROY. CAR BRAKING MECHANISM.

(Application filed Oct. 22, 1898.) (No Model.) 2 sheets-Sheet 2.

HitqeSaes v I Irv/511E11- 5 w I E onia w puow NlTE YTATES JAMES'F. MOELROY, OF ALBANY, NEW YORK, ASSIGNOR TO THE CONSOLI- DATED OAR-HEATING COMPANY, OF SAME PLACE.

CAR-BRAKING MECHANISM.

SPECIFICATION forming part of Letters Patent N 0. 644,444, dated February 2'7, 1900. Application filed October 22, 189s. Serial No. 694,271. (No model.)

To all whom itmcty concern/.-

Be it known that I, JAMES F. MOELROY, a citizen of the United States of America, and a resident of Albany, in the county of Albany and State of New York, have invented certain new and useful Improvements in Gar-Braking Mechanism, of which the following is a specification.

My invention relates to car-braking mechanism; and the object of my invention is to provide a mechanical brake adapted to be used on street-cars so constructed that the slack of the brake-chain may be taken up quickly and the brake-shoes brought in contact with the wheels during a partial revolution only of the brake-handle. I attain this object by means of the mechanism illustrated in the accompanying drawings, in which Figure 1 is a perspec ive taken from the under side of the car-pla form, showing the position of the operating parts after the slack has been taken up. Fig. 2 is a plan showing its position before the brake has been operated. Fig. 3 is a view of the brake-staff and supporting device, partly in section. I

out the several views.

The brake-staff A is provided with a handle B and supported .on the platform 0 of the car, through which platform the-brake-han dle passes, by means of a suitable casting D or in any convenient manner, to which casting D is preferably attached a cam-shaped block E. To the brake-staff is secured or constructed integral therewith anarm F, carry-- ing pivoted thereto a flying lever G, to one end of which is secured the brake-chain H. flying lever G has a curved surface g, adapted to engage with the cam-shaped block E. I also provide a stop-lug J, preferably on the under side of the flying lever G, which will limit the movement of the flying lever by coming in contact with the brake-arm F when the slack has been taken up and the chain engages with the brake-staff A and which lug serves to hold the flying lever away from the brake-arm, so that the flying lever may be revolved and the brake-chain wound onto the brake-staff without interference with the cam block. The cam-block E is preferably so constructed that there shall be a lever-stop con- The sisting of a recess or opening at e, which is preferably provided with a curved surface, the curve being the arc of a circle of which the fulcrum of the flying lever is the center, to allow one end of the flying lever G to en ter when the brake is 01f, at which time it will assume the position shown in Fig.2, the cam portion of said cam-block so arranged in contour that when the brake is operated to take up the slack the lever will be guided thereby, so as to throw'the brake-chain-carrying end of the flying lever forward of the brake staff until the lug J comes in contact with the brake-arm. brake-handle is operated for the purpose of setting the brakes the flying lever will move in the direction shown by the arrow, guided by the cam-block, until the end of the flying lever to-which the brake-chain is attached is forward of thebrake-staff and also passes the fulcrum of the said lever, when the pull on the chain will force the end of the lever carrying the chain toward the brake-stafi, bringing the chain in contact therewith and the lug J in contact with the-brake-arm F, which Similar letters refer to sim ilar parts throughwill prevent the flying lever from coming in contact with the cam-block during further revolution of the brake-staff in winding up the brake-chain. When the brake is thrown off, the chain will unwind from the brak'estafi until it reaches the position shown in Fig. 1, when a further movement in the direction of unwinding causes the lug to break its contact with the brake-arm F and the flying lever to assume the position shown in Fig. '2. About one-eighth of a revolution of the brake-handle will bring the chain in contact with the brake-staff and take up the slack,

bringing the brake-shoes in contact with the wheels. Further revolution Will wind the chain about the brake-staff and set the brakes.

What I claim as my invention, and desire to secure by Letters Patent of the United States, is a 1. A mechanical brake, consisting of a rotary brake-staff,an arm formed integral therewith or secured thereto, a lever pivoted upon said brake-arm, a brake-chain secured to said lever, with a cam-block arranged to guide 160 said lever, substantially as described.

2. In a mechanical brake, a rotary brake As thus arranged when the 65 stalf, an arm rigidly secured thereto, a lever pivoted to said arm, with arbrake-chain at-' tached to said lever, substantially as described.

3. In a mechanical brake, a brake-stafi, a brake-chain, a flying lever pivotally support ed to said brake-staff'or a projection thereon,

said brake-chain connected with said flying lever near one end of the same, a cam-block, all so arranged and connected up that a partial revolution of the brake-staff will cause the end of the flying lever to which the chain is attached to move forward of the brakestaff,guided by the cam-block, until the brakechain passes the fulcrum of the flying lever, when the brake-chain will come in contact with the-brake-staff, with a means for locking-the flying-lever out of contactwith-the cain-blocktduring the further revolution of the brake-staff in the direction of winding the brake-chain thereon.

4.- A mechanical brake, consistingof a flying lever suitablysupported by-a brake-staff and attached near one end to a brake-chain,

a ca-m.-block.arranged to guide said flying. le-, ver, with abrake-statf and-a means for lockingsaid flying lever out of contact with thecamrblockafterkthe revolution of the brakehandleahas brought the chain in contact with the brake-staff.

5. A mechanical brake, consisting of a hrake-stafi, a brake-chain, a flying lever pivotally mounted on a projection on the brake.- statf, said chain connected to said flying lever, a camrblock', a meansfor automatically locking said flying lever when the brake-chain is'brought incontact with the brake-staid during the revolution of the brake-staff, in such a manner that the cam-block will not interfere with the flying lever during the further revolution of the brake-staff in winding up the brake-chain.

6. Ina-mechanical brake, a brake-staff, a chain, a flying lever pivotally secured to a projection-on the brake-staff, said chain connected to said flying lever, a cam-block arranged to guide said flying lever, a lever-stop with which said flyingllever engages when the chain is unwound, and means for locking the flying'lever during the winding of the chain on the brake-statf in such a manner that the flyingvlever cannot engage with said lever-stopexcept when the .chainisunwound.

7. In a mechanical brake, abrake-stafl; abrake-chain, a flying lever pivoted to a projectionlon the brake-stalf andz'attached to said brake-chain, a cam-block arrangedto guide said flyingilever, a lever-stop consisting of a curved recess the surface of which'is thearc of a circleofwhich the fulcrum of the flyinglever isthe center,'so arranged that when the chain is unwound, the; end of the flying lever will come in contact with-saidstop.

Signed by me at Albany-aforesaid this 18th day of October, 1898;

JAMES DICELROY; Witnesses:

A.- V. A. MAOHAIG, CHAS. B. Mrrcl-n zLL.v 

